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Media Type
139
texts
Topics & Subjects
36
1942-jeremy-ashkenas
36
documentcloud
36
nytimes
15
ERIC Archive
14
U.S. Patents
5
NASA Technical Reports Server (NTRS)
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Collection
36
Document Cloud
22
American Libraries
15
Education Resources Information Center (ERIC) Archive
15
United States Patent and Trademark Office documents
12
RECAP US Federal Court Documents
7
Journals
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Creator
15
eric
15
united states patent and trademark office
5
nasa technical reports server (ntrs)
2
agnes g.murphy
2
armstrong, william, 1856-
2
empey, melba
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Language
136
English
1
Spanish
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